| 1 | /* |
| 2 | * Copyright (c) 1980, 1988 Regents of the University of California. |
| 3 | * All rights reserved. |
| 4 | * |
| 5 | * %sccs.include.redist.c% |
| 6 | */ |
| 7 | |
| 8 | #if defined(LIBC_SCCS) && !defined(lint) |
| 9 | static char sccsid[] = "@(#)fstab.c 5.15 (Berkeley) %G%"; |
| 10 | #endif /* LIBC_SCCS and not lint */ |
| 11 | |
| 12 | #include <sys/errno.h> |
| 13 | #include <fstab.h> |
| 14 | #include <unistd.h> |
| 15 | #include <stdio.h> |
| 16 | #include <stdlib.h> |
| 17 | #include <string.h> |
| 18 | |
| 19 | static FILE *_fs_fp; |
| 20 | static struct fstab _fs_fstab; |
| 21 | static error(); |
| 22 | |
| 23 | static |
| 24 | fstabscan() |
| 25 | { |
| 26 | register char *cp; |
| 27 | #define MAXLINELENGTH 1024 |
| 28 | static char line[MAXLINELENGTH]; |
| 29 | char subline[MAXLINELENGTH]; |
| 30 | int typexx; |
| 31 | |
| 32 | for (;;) { |
| 33 | if (!(cp = fgets(line, sizeof(line), _fs_fp))) |
| 34 | return(0); |
| 35 | /* OLD_STYLE_FSTAB */ |
| 36 | if (!strpbrk(cp, " \t")) { |
| 37 | _fs_fstab.fs_spec = strtok(cp, ":\n"); |
| 38 | _fs_fstab.fs_file = strtok((char *)NULL, ":\n"); |
| 39 | _fs_fstab.fs_type = strtok((char *)NULL, ":\n"); |
| 40 | if (_fs_fstab.fs_type) { |
| 41 | if (!strcmp(_fs_fstab.fs_type, FSTAB_XX)) |
| 42 | continue; |
| 43 | _fs_fstab.fs_mntops = _fs_fstab.fs_type; |
| 44 | _fs_fstab.fs_vfstype = |
| 45 | strcmp(_fs_fstab.fs_type, FSTAB_SW) ? |
| 46 | "ufs" : "swap"; |
| 47 | if (cp = strtok((char *)NULL, ":\n")) { |
| 48 | _fs_fstab.fs_freq = atoi(cp); |
| 49 | if (cp = strtok((char *)NULL, ":\n")) { |
| 50 | _fs_fstab.fs_passno = atoi(cp); |
| 51 | return(1); |
| 52 | } |
| 53 | } |
| 54 | } |
| 55 | goto bad; |
| 56 | } |
| 57 | /* OLD_STYLE_FSTAB */ |
| 58 | _fs_fstab.fs_spec = strtok(cp, " \t\n"); |
| 59 | if (!_fs_fstab.fs_spec || *_fs_fstab.fs_spec == '#') |
| 60 | continue; |
| 61 | _fs_fstab.fs_file = strtok((char *)NULL, " \t\n"); |
| 62 | _fs_fstab.fs_vfstype = strtok((char *)NULL, " \t\n"); |
| 63 | _fs_fstab.fs_mntops = strtok((char *)NULL, " \t\n"); |
| 64 | if (_fs_fstab.fs_mntops == NULL) |
| 65 | goto bad; |
| 66 | _fs_fstab.fs_freq = 0; |
| 67 | _fs_fstab.fs_passno = 0; |
| 68 | if ((cp = strtok((char *)NULL, " \t\n")) != NULL) { |
| 69 | _fs_fstab.fs_freq = atoi(cp); |
| 70 | if ((cp = strtok((char *)NULL, " \t\n")) != NULL) |
| 71 | _fs_fstab.fs_passno = atoi(cp); |
| 72 | } |
| 73 | strcpy(subline, _fs_fstab.fs_mntops); |
| 74 | for (typexx = 0, cp = strtok(subline, ","); cp; |
| 75 | cp = strtok((char *)NULL, ",")) { |
| 76 | if (strlen(cp) != 2) |
| 77 | continue; |
| 78 | if (!strcmp(cp, FSTAB_RW)) { |
| 79 | _fs_fstab.fs_type = FSTAB_RW; |
| 80 | break; |
| 81 | } |
| 82 | if (!strcmp(cp, FSTAB_RQ)) { |
| 83 | _fs_fstab.fs_type = FSTAB_RQ; |
| 84 | break; |
| 85 | } |
| 86 | if (!strcmp(cp, FSTAB_RO)) { |
| 87 | _fs_fstab.fs_type = FSTAB_RO; |
| 88 | break; |
| 89 | } |
| 90 | if (!strcmp(cp, FSTAB_SW)) { |
| 91 | _fs_fstab.fs_type = FSTAB_SW; |
| 92 | break; |
| 93 | } |
| 94 | if (!strcmp(cp, FSTAB_XX)) { |
| 95 | _fs_fstab.fs_type = FSTAB_XX; |
| 96 | typexx++; |
| 97 | break; |
| 98 | } |
| 99 | } |
| 100 | if (typexx) |
| 101 | continue; |
| 102 | if (cp != NULL) |
| 103 | return(1); |
| 104 | |
| 105 | bad: /* no way to distinguish between EOF and syntax error */ |
| 106 | error(EFTYPE); |
| 107 | } |
| 108 | /* NOTREACHED */ |
| 109 | } |
| 110 | |
| 111 | struct fstab * |
| 112 | getfsent() |
| 113 | { |
| 114 | if (!_fs_fp && !setfsent() || !fstabscan()) |
| 115 | return((struct fstab *)NULL); |
| 116 | return(&_fs_fstab); |
| 117 | } |
| 118 | |
| 119 | struct fstab * |
| 120 | getfsspec(name) |
| 121 | register const char *name; |
| 122 | { |
| 123 | if (setfsent()) |
| 124 | while (fstabscan()) |
| 125 | if (!strcmp(_fs_fstab.fs_spec, name)) |
| 126 | return(&_fs_fstab); |
| 127 | return((struct fstab *)NULL); |
| 128 | } |
| 129 | |
| 130 | struct fstab * |
| 131 | getfsfile(name) |
| 132 | register const char *name; |
| 133 | { |
| 134 | if (setfsent()) |
| 135 | while (fstabscan()) |
| 136 | if (!strcmp(_fs_fstab.fs_file, name)) |
| 137 | return(&_fs_fstab); |
| 138 | return((struct fstab *)NULL); |
| 139 | } |
| 140 | |
| 141 | setfsent() |
| 142 | { |
| 143 | if (_fs_fp) { |
| 144 | rewind(_fs_fp); |
| 145 | return(1); |
| 146 | } |
| 147 | if (_fs_fp = fopen(_PATH_FSTAB, "r")) |
| 148 | return(1); |
| 149 | error(errno); |
| 150 | return(0); |
| 151 | } |
| 152 | |
| 153 | void |
| 154 | endfsent() |
| 155 | { |
| 156 | if (_fs_fp) { |
| 157 | (void)fclose(_fs_fp); |
| 158 | _fs_fp = NULL; |
| 159 | } |
| 160 | } |
| 161 | |
| 162 | static |
| 163 | error(err) |
| 164 | int err; |
| 165 | { |
| 166 | char *p; |
| 167 | |
| 168 | (void)write(STDERR_FILENO, "fstab: ", 7); |
| 169 | (void)write(STDERR_FILENO, _PATH_FSTAB, sizeof(_PATH_FSTAB) - 1); |
| 170 | p = strerror(err); |
| 171 | (void)write(STDERR_FILENO, p, strlen(p)); |
| 172 | (void)write(STDERR_FILENO, "\n", 1); |
| 173 | } |